import time as t
class Mt():
    def __init__(self):
        self.unit = ['年', '月', '日', '小时', '分', '秒']
        self.prompt = '未开始运行！'
        self.lasted = []
        self.begin = 0
        self.end = 0
        
    def __str__(self):
        return self.prompt

    __repr__ = __str__

    def __add__(self, other):
        prompt = '总共运行了'
        result = []
        for index in range(6):
            result.append(self.lasted[index] + other.lasted[index])
            if result[index]:
                prompt += (str(result[index]) + self.unit[index])
        return prompt
    
    def start(self):
        self.begin = t.localtime()
        self.prompt = '请先用stop()停止'
        print('计时开始！')

    def stop(self):
        if not self.begin:
            print('请先调用start()计时！')
        else:
            self.end = t.localtime()
            self._calc()
            print('计时结束！')
            print('请输入"t1"查看运行时间！')

    def _calc(self):
        self.lasted = []
        self.prompt = '总共运行'
        for index in range(6):
            self.lasted.append(self.end[index] - self.begin[index])
            if self.lasted[index]:
                self.prompt += (str(self.lasted[index]) + self.unit[index])

        self.begin = 0
        self.end = 0
